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A071244 n*(n-1)*(n^2+2)/6. 2
0, 0, 2, 11, 36, 90, 190, 357, 616, 996, 1530, 2255, 3212, 4446, 6006, 7945, 10320, 13192, 16626, 20691, 25460, 31010, 37422, 44781, 53176, 62700, 73450, 85527, 99036, 114086, 130790, 149265, 169632, 192016, 216546, 243355, 272580, 304362, 338846, 376181 (list; graph; refs; listen; history; text; internal format)
OFFSET

0,3

REFERENCES

T. A. Gulliver, Sequences from Arrays of Integers, Int. Math. Journal, Vol. 1, No. 4, pp. 323-332, 2002.

LINKS

Vincenzo Librandi, Table of n, a(n) for n = 0..2000

FORMULA

a(n) = 5*a(n-1) - 10*a(n-2) + 10*a(n-3) - 5*a(n-4) + a(n-5), n > 4, a(0)=0, a(1)=0, a(2)=2, a(3)=11, a(4)=36. [Yosu Yurramendi, Sep 03 2013]

PROG

(MAGMA) [n*(n-1)*(n^2+2)/6: n in [0..40]]; // Vincenzo Librandi, Jun 14 2011

(PARI) a(n)=n*(n-1)*(n^2+2)/6; \\ Joerg Arndt, Sep 04 2013

CROSSREFS

Sequence in context: A184538 A316322 A238706 * A005583 A176916 A015519

Adjacent sequences:  A071241 A071242 A071243 * A071245 A071246 A071247

KEYWORD

nonn,easy

AUTHOR

N. J. A. Sloane, Jun 12 2002

STATUS

approved

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Last modified November 17 03:06 EST 2019. Contains 329216 sequences. (Running on oeis4.)